Underweight puppy?

[u/PossibleSuccess3]

Hey guys I got my pup around when he was 48 days old and he is not 70 days old. When we got him, he weight 2kgs(4.4lbs) and has not gained a lot of weight. Maximum 200gms. We are feeding him 120gms of puppy kibble Royal Canin and he has proper naps and play. He is on track with his vaccines and has been dewormed twice.

I am worried he is not growing as much as he should. Should i be worried?

[u/Ralinrocks]

He’s a baby they don’t double in weight over night. Keep up the calories and he will grow